Trolley-wheel.



PATENTED AUG. 6, 1907.

H. B. SA-WYER.

TROLLEY WHEEL. APPLIOATION FILED FEB. 20, 1905.

UNITED STATES PATENT oFFIoE.

HARRY B, SAWYER, CLEVELAND, OHIO. v

TROLLEY-WHEEL.

Specification of Letters Patent.

Patented. Aug. 6, 1907.

Application filed Isbrnary 20,1905- Serial No. 246,432-

To all whom it may concern:

Be it known that I, HARRY B. SAWYER, a citizen of the United States, anda resident of Cleveland, couhty of Cuyahoga, State of Ohio, haveinvented certain new and useful Improvements in Trolley-Wheels, of whichI hereby declare the following to be a full, clear, and

exact description, such as will enable others skilled in the art towhich it appertains to make and use the same.

The invention relates to improvements in' trolley serve as the treadportion of the wheel.

A further object of the invention is to make the ring detachable fromthe rim and body of'the wheel so that when worn or broken it can readilybe replaced without renewing the entire wheel.

The invention consists in the split ring in the outer edge of which isturned or cast the trolley groove for engagement with the transmissionwire, in means for securingthe same'in place, and in other details ofconstruction and arrangement of parts, as hereinafter described, shownin the accompanying. drawings, and specifically pointed out inthe'claims.

In the accompanying drawings, Figure l is an elevation of the trolleywhich is mounted in its harp and partly. broken away to show therelative positions of the engaging parts; Fig. 2 is a' transversesection of the wheel which is shown as formed of two side or rim platesinclosing an oil reservoir between them, and also showing the mannerof-securing the tread ring thereto; Fig 3 is a perspective view of onehalf of the ring.-

In these views, 1 is the body ofthe wheel which is seep to consist oftwo plates, 2, and rim portions 3, riveted securely together and soshaped as to form achannel at the outer edge for the reception of thetread ring 4.

It is not desirable that either of the rim portions should be removed topermit the withdrawal of the tread ring since such a construction wouldadd to the complexity of the device and expense of construction,

hence to enable the ring to be easily withdrawn it is split or cuttransversely into two halves, which can be brought togetheriron eachside over the body and afterwards fastened in place. l

The ends of the ring sections are cut away on the sides at 5 so that theabutting ends of the sections will overlap each other and prevent anyunevenness or wearing of a groove in the face of the tread by a'complete transverse joint. The extremities of thesections are thensecured by means of a key or keeper such as a pin 6 passing through themand through-the exterior rim.

This device is simple and inexpensive in construction, and may be ofgreat economy in use sincethe bronze tread ring is ofmuch moreexpensive'material than the body and rim, which can be made of sheetsteel or malleable-0r cast iron or steel.

In the drawings'the body and rim portions are shown to be constructed ofsheet metal and each side is concaved so that when the parts are unitedthey form to- 'gether a reservoir 7 to contain the lubricating oil forthe journal of the wheel. These parts as shown are riveted securelytogether.

I do not confine myself, however, to the use of the detachable treadringfor any particular class of wheel, since any wheel body provided withextended rim flanges adapted to receive the tread ring between them willcome within the spirit of. my invention.

Having described the invention, what I claim as new grooved ring, theadjacent extremities of said sections being adapted to overlap eacliother substantially as described.

2. In a trolley wheel provided with extended rim flanges, a separabletread ring seated between said flanges, the sections of said ring havingoverlapping extremities.

3. Asectional tread ring for a trolley wheel the several sections ofwhich are provided with overlapping extremities.

4. A sectional tread ring for a trolley wheel, the extremities of thesections comprising the ring overlapping on the center line of the treadsurface, substantially as described.

5. -In a trolley wheel comprising side portions shaped to form extendedflanges, a tread ring in separable sections secured between saidflanges, the said flanges extending beyond and protecting said treadring, the said ring sections having overlapping extremities, and pinspassing through said overlapping ends of the ring sections, and throughsaid side portions, substantially as described.

in testimony whereof I hereunto set my hand this 18" day'of February1905.

, HARRY B. SA WYER.

Witnesses: 7 I

WM. M. Mormon, Gnu. S. Conn.

